Multi single-point

[chourmo]

This is a feature request for a multi simple analysis. By having several start points, it is possible to find the service area of each starting point.

As an example, if each start point is a library, the analysis would show the polygon at x minutes by transit around each library, and how many people can access each library.

It would be even better to differentiate each service area by the closest starting point and excluding overlapping isochrones.